Fitness Tools

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Deterministic fitness calculators — TDEE, adaptive TDEE, body fat, 1RM, macros — with consensus.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "Fitness Tools": {
      "url": "https://fitness-tools-mcp.ajwallacemusic.workers.dev/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (10)

• tdee read-only

  Estimate BMR and TDEE via Mifflin-St Jeor, Harris-Benedict, Katch-McArdle, and Cunningham. Provide body_fat or lean_mass to unlock the LBM-based methods.

  Parameters:

  • sex (required) — string
  • age (required) — number
  • height (required) — object
  • weight (required) — object
  • activity (required)
  • methods
  • body_fat
  • lean_mass

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• adaptive-tdee read-only

  Measure actual TDEE from a logged history of daily weight and/or calorie intake. Default method (kalman) is a joint Kalman filter over true weight and TDEE — handles missing days, gates outliers, and reports uncertainty (CI95) alongside denoised true weight; regression/endpoints are simple window-based estimates kept for comparison. Use instead of formula TDEE once real logged data exists. Each entry needs at least one of weight/kcal (not necessarily both). Entry dates must span 10 years or less (earliest to latest). Note: all methods need at least one weigh-in (kalman) or two (regression/endpoints) — a history with zero weight entries throws under the kalman default; pass methods:'all' to get a graceful empty/skipped result instead.

  Parameters:

  • entries (required) — array
  • methods
  • window_days — integer
  • prior_tdee_kcal — number — Optional starting TDEE estimate, e.g. from the tdee tool; speeds early convergence.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• body-fat read-only

  Estimate body-fat % via US Navy circumference, Jackson-Pollock 3-site skinfold, and Deurenberg (BMI-based) methods.

  Parameters:

  • sex (required) — string
  • age
  • hip
  • neck
  • waist
  • height
  • weight
  • methods
  • skinfold_sum

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• one-rep-max read-only

  Estimate 1RM from a submaximal set via Epley, Brzycki, Lombardi, Wathan, O'Conner, and Mayhew; returns a %1RM load chart.

  Parameters:

  • weight (required) — object
  • reps (required) — integer
  • methods

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• macros read-only

  Compute protein/fat/carb grams for a calorie target using the g-per-kg-bodyweight method, with goal-based protein defaults.

  Parameters:

  • calories (required) — number
  • weight (required) — object
  • goal — string
  • methods
  • fat_g_per_kg
  • protein_g_per_kg

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• activity-multiplier read-only

  Estimate the TDEE activity multiplier via the classic lookup table or a NEAT+EAT model (occupation/steps for non-exercise, training volume for exercise).

  Parameters:

  • bmr
  • weight
  • methods
  • intensity
  • occupation
  • steps_per_day
  • activity_level
  • session_minutes
  • sessions_per_week

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• powerlifting-attempts read-only

  Deterministic opener/second/third attempts from an estimated 1RM, plus a warmup ramp and per-side plate loading. Tunable by aggressiveness and available plates.

  Parameters:

  • one_rep_max (required) — object
  • bar_weight
  • aggressiveness — string
  • available_plates

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• muscle-potential read-only

  Estimate drug-free maximum bodyweight at a target body-fat % via Casey Butt (wrist+ankle), the FFMI~25 natural cap, and Berkhan's max-contest-weight model. Men only in v1.

  Parameters:

  • sex (required) — string
  • height (required) — object
  • ankle
  • wrist
  • methods
  • target_body_fat_pct — number

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• ffmi read-only

  Compute the Fat-Free Mass Index (FFMI) and its height-adjusted form from weight and body fat (or lean mass), and flag whether it exceeds the ~25 natural ceiling.

  Parameters:

  • height (required) — object
  • weight (required) — object
  • methods
  • body_fat
  • lean_mass

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• rsmi read-only

  Estimate the appendicular skeletal muscle index (RSMI) from a DXA value (direct) and/or an anthropometric estimate (Wen 2011), and flag low muscle mass against EWGSOP2, AWGS, and Baumgartner sarcopenia cutoffs.

  Parameters:

  • sex (required) — string
  • height (required) — object
  • weight (required) — object
  • age (required) — number
  • asm_kg
  • methods

  Hints: read-only yes · destructive no · idempotent yes · open-world no

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